2.1.7. Interconnecting Boards via CT Bus or SCbus

In order for the Intel Dialogic boards in your system to interoperate, you must connect all SCbus or CT Bus compatible boards with either an SCbus or a CT Bus cable. All DM3 boards have the H.100 connector. For other Intel Dialogic boards, determine whether they have H.100 connectors or SCbus connectors. To determine which connector your board uses, consult the Quick Install Card included with your board.

Connect the boards as follows:

• All boards that have H.100 connectors: Connect the boards with a CT Bus cable.
• All boards that have SCbus connectors: Connect the boards with an SCbus cable.

For a mixed chassis, additional cabling is required:

• PCI SCbus boards with ISA SCbus boards: In a PCI/ISA mixed chassis, a cable is required to connect the SCbus over from the PCI side of the chassis to the ISA side. The cable must provide a gap long enough to span over the motherboard residing between the PCI portion of the backplane and the ISA portion of the backplane. Cables are available from Intel.
• PCI CT Bus boards with SCbus boards: When combining CT Bus and SCbus products within the same chassis, a CT Bus/SCbus Adapter is needed to connect the two buses together. The CT Bus/SCbus Adapter, available from Intel, is a small printed circuit board that becomes part of the cable assembly. This adapter resides in only one place in the chassis, determined by where the changeover from the SCbus cable to the CT Bus cable is made within the system. All products using the CT Bus are on one side of the adapter, and all products using the SCbus are on the other side. Only one adapter should be used in order to preserve electrical signal integrity on the bus. For further information about the adapter, see the CT Bus/SCbus Adapter Quick Install Card.

For a discussion of hardware configuration in mixed systems, including use of the CT Bus/SCbus Adapter, refer to Section 2.1.4, Configuring a Mixed CT Bus/SCbus System. Additional information about cabling may be found on the Intel® Networking & Communications Telecom Support Resources Web site in the document Cabling Issues in a PCI and Mixed ISA/PCI System (http://resource.intel.com/telecom/support/tnotes/tnbyos/winnt/tn206.htm).

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